Portion of an electric drill



FIG. 1 is a perspective view of the portion of an electric drill embodying the ornamental design of the present invention;

FIG. 2 is a side view of the portion of an electric drill;

FIG. 3 is an opposite side view of the portion of an electric drill;

FIG. 4 is a rear view of the portion of an electric drill; and,

FIG. 5 is a top view of the portion of an electric drill.

The broken lines in FIGS. 1-5 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a portion of an electric drill, as shown and described. 